The metal structure of the tower crane, the track and the metal shell of all the electrical equipment shall have reliable earthing devices, and the grounding resistance shall not be greater than 4 ohms, and lightning protection devices shall be set up.Fourth. Pole arrangement, each attachment device attached to the wall and spaced distance should be in accordance with the provisions of the original factory, homemade bar design calculations should be.
Tower cranes shall not operate near overhead transmission lines. If they are limited to field conditions, they must take safety measures when operating alongside the line. The safe distance between tower crane and overhead transmission line shall comply with the regulation.
After the tower crane is installed, the whole machine should be inspected and adjusted, and shall be ready for delivery after passing the inspection in stages and through the whole machine. In the case of no load, the deviation of the verticality between the tower and the ground shall not exceed 4/1000.. The motor and hydraulic unit of the tower crane shall be carried out in accordance with the relevant provisions concerning the motor and hydraulic device.
When the wind is above four, no lifting, installation or disassembly shall be carried out. Check the connection of all parts of the hydraulic jacking system before jacking up. No swing arm and other operations are prohibited during jacking.
